对现代认知心理学关于知识图式的研究作了系统的阐述，分析了产生式系统取向和联结主义取向的优缺点。
Analysis have been done on the knowledge schema research of modern cognitive psychology, and on the advantage and disadvantage on production system and connectionism.
事实上，黑莓一开始就是以多任务为设计取向，我认为我们的操作系统一直被低估了。
The fact is that the BlackBerry was designed to multitask from day one. I think our operating system has constantly been underestimated.
对于低级的攻击，ping流可用于偷偷地查找信息，但是如果要截取向目标发送的包，则要求系统离线或停机。
At the low end, a ping flood can be used to uncover information covertly, but throttle up the packets being sent to a target or victim so that now, the system will go offline or suffer slowdowns.
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